/*
 * Copyright (c) 2012, Bayesian Logic, Inc.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Bayesian Logic, Inc. nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * Bayesian Logic, Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 */
#include <math.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>

#include "../netvisa.h"

void EventMagPrior_Init_Params(EventMagPrior_t * prior, int nparams,
                               const char * filename)
{
  FILE * fp;
  
  assert(1 == nparams);

  fp = fopen(filename, "r");
  
  if (!fp)
  {
    fprintf(stderr, "Unable to open %s\n", filename);
    exit(1);
  }
  
  if (2 != fscanf(fp, "%lf %lf\n", &prior->min_mag, &prior->mag_rate))
  {
    fprintf(stderr, "Unable to read min magnitude and magrate in %s\n", 
            filename);
    exit(1);
  }

  fclose(fp);
}


double EventMagPrior_LogProb(const EventMagPrior_t * dist, double val,
                             int nargs)
{
  assert(0 == nargs);

  if (val < dist->min_mag)
    return -HUGE_VAL;
 
  return log(dist->mag_rate) - dist->mag_rate * (val - dist->min_mag);
}

